Type-writing machine.



PATENTED MAY 28, 1907. B. G. STIGKNEY.

TYPE WRITING MACHINE.

APPLICATION FILED 00114. 1903.

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H15 TTUFINEIY 7 0 9 1 no 2 Y A M D E T N E. T A P v E N K 0 I T s nw R 44 h 5 5 O0 nw N TYPE WRITING MACHINE. APPLIOATION FILED 001 14, 1903.

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' 14:5 T'TUHNEY UNITED STATES PATENT. OFFICE.

. BURNHAMo. s'rIoK EY, ELIZABETH, NEw JERSEY, ASSIGNOR To UNIONTYPEWRITER COMPANY,"0F JERSEY- CITY. NEW JERSEY, A CORPORA- TION OF NEWJERSEY. I

TY E-WRITING MAQHINE.

l o all whom it may concern:

Beit known that I, BURNHAM C. STICKNEY,

, a citizen of the United States, and a resident of-Elizabeth, in thecounty ,of Union and State of New Jersey, have invented certain new anduseful" Improvements in Type-,

"Writing Machines, of which thefollowing is aspecification.

, This invention relates toty'pe bar machines, and particularly those ofthe front strike variety, and its object is to provide improved meansfor so connecting the keys to the. tgpe bars as to diminish theleverage.

of the ormer upon the latter duringthe printing strokes, thereby tocushion the key strokes and improve the type impressions,

FInthe drawings forming part 01' this speci fication, Figure 1 is acentral longitudinal v sectional view of a front strike writing machinemade in accordance with my present im rovements; onetype action beingshown n lines in normal pos1t1on, and another 111 dot-tedlines inprinting position. Fig. 2 is a rear sectional elevation taken at aboutthe line w-x of'Fig. 1-'.

- Similarparts are identified by similar signs throughout the views.

The frame of the machine may-comprise a base- 1;;j' corner posts 2, andtop plate 3, over 'whichmay r,'una carriage bearing a platenA.

' Rearwfardlystriking type bars '5 are pivoted bearing levers 14. Itwill be seen that the,

various pivots 13 are situated 'in-a single transverse plane. The levers14' are levers of the first order, and are pivoted in a singletransverse plane upon a transverse rod 15.

The upper edges of the arms 12 are provided with elongated curved treadsor rockers'16 adapted to bear up against theunder side .of a commonhorizontal fulcrum bar 17, and to roll forwardly therealong during theprinting strokes of the type bars.

At the beginning of the stroke, the remote or rear end of the arm 12 isin cont'actwith Specification of Letters Patent. Application filed, oahs '14, 1908." Serial No. 177,oo1=

an elongate tread, a wherewsai 'Pate'nted May 28,1907.

the fulcrum bar, .as indicated in full lines, whereby theleverage of thekey upon the type bar is maximum at the first part of the key stroke;but during the remainder thereof the arm rocks or rollsalong the bar,1ts

in a forward direction unti the type strikes the platen, at which momenttheforward point of contact therewith gradually shifting end'of the arm12 is in contact with the ful-' crum bar, as shown indotted lines. 'Atthis point the leverage of the key upon the type ar is' least. Thus atthe beginning of .the stroke, themovement of the type bar is very slightrelatively to that of the key, thereby avoiding a jar to the finger andcushioning the stroke; while at the termination of the stroke themovement of the type bar 1s acby tending to absorb the momentum of thecelerated relatively to. that of the key, therehand of the operator andto ease the latter part of the key stroke; while owing to its;

increased speed, the type bar is caused to deliver a powerful blowvagainst the'platen. It will. be observed that the type actions are simla in construction and operation, as

wel as compact and inexpensive to manufacture.

'The arms 11 *of the elbow levers are of graduated lengths, beingshortest in the middle of the system and of gradually increasinglengthsfrom the middle to the sides of the system; while the arms 12 arein a like mannor made of different lengthsand corresponding curvatures,thus aflording a uniform leverage, touch and dip throughout the system.f The type bars. are provided with returning springs 18 and the keylevers mayalso be provi ed withreturning springs 19, although'the lattermay be omitted if desired, but as their action upon the key is direct,not affected by the change in the leverage during the key stroke, Iprefer to use them, as they have a more uniform action on the keys" thanthe springs 18.

Variations may be resorted to within the im rovements may be usedwithout others.

at 'I claim as new and desire to secure by Letters-Patent, is I 1. Thecombination Witha type bar,-.of .a key lever of the first order asub-lever pivot-' ed'to said ke lever, oneof said levers having scopeof-my invention and'portionsf of my,

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tread operates so as to afford a changing leverage during the printingstroke of the type bar,.and a connection from said sub-lever to so as to'afiord a changing leverage duringtlre printing stroke of the typebar,to diminish the leverage of the key upon the type bar.

3; In a front-strike writing machine, the combination with a rearwardlystriking type bar, of a key lever pivoted intermediate of its ends toform a lever of the first order, an

elbow lever pivoted at the rear end portion of said key lever andconnected to the type bar; said elbow lever having a rearwardlyextending elongated tread; and a fulcrum whereon. said tread rolls toafford a changing leverage during the printing stroke of the type bar.

4. In a'f'ront strike writing machine, the

combination with a rearwardly striking type bar, of a key lever of thefirst order; an elbow lever pivoted thereto and comprising an upwardlyextending 'arm which is connected to the type bar and also a rearwardlyextending arm having-an elongated tread upon its upper edge; and afulrcum whereon said tread rolls during the printing stroke; one of saidtread and fulcrum elements being curved.

5. In a front strike writing machine, the combination with a rearwardlystriking type bar, of a key lever of the first order, an elbow leverpivoted thereto comprising an upwardly extending arm which is connectedto the type bar and also a rearwardly extending arm having an elongatedtread upon its up-- per edge; and a fulcrum whereon said, tread v rollsduring the printing stroke; one of said tread'and fulcrum elements beingcurved, and said type bar being shiftable to enable different type toprint. 6. In a typewriting machine, the combination of a seriesof'segmentally arranged type bars, a series of key'levers of the firstorder, a series of sub-levers pivoted to and'carried by said key leversand both sets of arms of which are progressively longer from the centerto the sides of the series of sub-levers.

7. In a front-strike typewriting machine, the combination of a series ofsegmentally arranged rearwardly striking type bars, a series of keylevers of the first order, a series of elbow sub-levers pivoted to andcarriedby said key levers, each of said sub-levers having an upwardlyextending arm that is operatively connected to a type bar, and a fulcrum arm that extends in the general direction of the length of theassociated key lever, both sets of arms increasing in length from thecenter to the sides of the system 'of sublevers, and a fulcrum agaiiistwhich the fulcrum arms bear andon which they have a rolling action toaflord a changingleverage of which are in a single transverse plane, aseries of elbow sub-levers pivoted to the rear ends of and carried bysaid key levers, each of said sub-levers having an upwardly extendingarm that is operatively connected to a type bar, and a rearw'ardlyextending fulcrum arm, both sets of arms increasing in length from thecenter to the sides of thc system of sub-levers, and a fulcrum againstwhich the rearwardly extending fulcrum arms bear and on which they havea rolling action to afford a changing leverage during the printinstrokes.

9. In a ront-strike typewriting machine, the combination of a series ofsegmentally arranged rearwardl y striking type bars, a series of keylevers of the first order, the pivots of which are in a singletransverse plane, a series of elbow sub-levers pivoted to the rear endsofvsaid key levers in a single transverse plane, each of said sub-levershaving an upwardly extending arm, a link connecting each of saidupwardly extending arms to a type bar, a rearwardlyextending fulcrum armon each sub-lever, both sets of arms of the sub-levers increasing inlength as the sides of the system of sub-levers are approached, and afulcrum against which the rearwardly extending fulcrum arms bear and onwhich they have a rolling action to afl'ord a changing leverage duringthe printing strokes.

10. In a front-strike typewritlng machine,

the combination of a series of segmcntally ari ranged rearwardlystriking type bars, a series of key levers pivoted intermediate of theirends and the pivots of which are in a single transverse plane, a seriesof elbow suhlevers pivoted to the rear ends of said key levers in asingle transverse phme, each of said sub-levers having an upwardlyextcnding arm and a rearwardly extending I'ulcrnm arm that projectsbeyond the associated key lever and in the general direction of thelength thereof, a series of links which connect the said upwardlyextending arms to the type bars, a fulcrum with which fulcrum armsco-operatc and on which they have a rolling action to vary the lcvm'agcduring the rinting strokes, and curved contact I'm-cs ietween the saidfulcruni arms and tut-rum, both sets of arms of said elbow suhdm'tu'sincreasing in length from the center to the sides of the system.

'11. In. a front-strike typcwrlting HHHlHH.

the combination of a Stli0 of segment ally at, ganged rearwardlystriking type liars, a scries of key levers of the first order, aseriesof elbow sub-levers pivoted to the rear ends of said key levers. nd withtheir pivots in a sin 'gl'e transverse plane,- each of said sub-levershaving an upwardly, extending arm and a rearwardly extending fulcrum armthat pro jects beyond the associated key lever and in the generaldirection of the length thereof, a

series of links which connect the said upwardly extending arms to thetype bars, a

fulcrum with which fulcrum arms co-dperate,

and on which they have a rolling action to vary the leverage during theprinting strokes curved contact faces between the said full-- said elbowsub-levers being shorter atthe center of the system than they are at thesides, and means which aiford a shift of the type bars to change thecase position thereof for upper and lower case writing.

Signed at the borough of Manhattan, city of New York, in the county ofNew York, and State of New York, this 12th day of October A. D. 1903. i

. v BURNHAM C. STICKNEY.

Witnesses:

E. M. ,WELLS, M. F. HANSURYJBERL

